1. Bell Ringer 11-18-09 DO NOT LOOK IN YOUR BOOK OR VOCABULARY!!
Write the definition of a solution in your own words.
What is an example of a solution?

2. Understanding Solutions
Chapter 7 Section 1
Understanding Solutions

3. Solutions, Solvents, & Solutes
A solution is a well- mixed mixture that contains a solvent and at least one solute.

4. The solute is the substance that dissolves to form a solution
The solute is the substance that dissolves to form a solution. The solute is the smallest amount in a solution.
The solvent is the substance in which a solute dissolves. The solvent is the largest amount in a solution.

5. Water
Water is the universal solvent since it dissolves so many substances.
Solutions with Water: Sap, Blood, Saliva, Tears, Sweat, Urine

6. A solution has the same properties throughout and its solute particles are too small to see.
Solutions
without
water  gas

7. Examples of Common Solutions
Chart on page 223

8. Colloids
A colloid is a mixture containing small, undissolved particles that do not settle out.
It contains larger particles than a solution. The particles are still too small to be seen easily, but large enough to scatter a light beam.
Ex: gelatin, fog, milk, mayonaise, shaving cream

9. Suspensions
A suspension is a mixture in which particles can be seen and easily separated by settling or filtration.
It does not have the same properties throughout. It contains visible particles that are larger than the particles in solutions or colloids.
Ex: pepper in water, snow in snow globe

10. Particles in a Solution
When a solution forms, particles of the solute leave each other and become surrounded by particles or the solvent.

11. Effects of Solutes on Solvents
Solutes lower the freezing point and raise the boiling point of a solvent.

12. Concentration and Solubility
Chapter 7 Section 2
Concentration and Solubility

13. Measuring Concentration
The concentration of a solution is how much solute is present compared to the amount of solvent.
To measure concentrations, you compare the amount of solute to the amount of solvent.

14. Solubility
Solubility is a measure of how much solute can dissolve in a solvent at a given temperature.
A saturated solution contains so much solute that no more dissolves.
An unsaturated solution can continue to dissolve more solute.

15. Solubility can be used to help identify a substance because it is a characteristic property of matter.

16. Factors Affecting Solubility
Pressure
Type of Solvent
Temperature

17. Describing Acids and Bases
7.3 Notes
Describing Acids and Bases

18. Properties of Acids Taste Sour Reacts with Metals and Carbonates
Turns blue litmus paper red

19. Properties of Bases Taste bitter Feels slippery
Turns red litmus paper blue

20. Litmus Paper
Is an easy way to identify quickly whether an unknown compound is an acid or a base.

21. Uses of Acids and Bases
Acids and bases have many uses around the home and in industry.
Examples are on page in your science book.